Electric cut-out.



T. E. MURRAY.

ELEGTRIC GUT-OUT. APPLICATION FILED 11017.19f1910.

991,006. Patented May 2, 1911.

2 SHBETS-SHEET 1.

T. E. MURRAY. 7 ELECTRIC GUT-OUT.

APPLIOATION FILED NOV. 19, 1910.

Patented May 2, 1911.

. j m a H On On I r w. l B. 0. m z 0 2 0 m m. 1 9 w w 9 THOMAS E.MURRAY, 0]? NEW YORK, N. Y.

ELECTRIC CUT-OUT.

Specification of Letters Patent.

Patented May 2, 1911.

Application filed November 19, 1910. Serial No. 593,162.

itself. Said device is herein embodied 1n an auxiliary fuse disposed ina suitable carrier seated in a wall of the base block, the terminals ofsaid auxiliary fuse being connected to contacts on the carrier whichcooperate with contacts on the main fuse case which are connected to theterminals .of the main fuse. r

In the accompanying drawings-Figure 1 is a perspective view of mycut-out, showing the auxiliary fuse carriers, cover and one of theshields in place. Fig. 2 is a plan view of the base block, with thecover and I shields removed. Fig. 3 is a section, with the cover andshields removed. on the line 3, 3, of Fig. 2. Fig. 4 isan elevation of aportion of the inner side of the wall of the base block, the bottombeing in section, with the fuse holding clip and the auxiliary fusecarrier removed. Fig. 5 is a section on the line 5, 5, of Fig. 2, withone of the shields and locking bar in place. Fig. 6 is an elevation of aportion of the longitudinal partition, the bottom of the box being insection. Fig. 7 is across section on the line 7, 7, of Fig. 3. Fig. 8 isa cross section of a portion of the box, showing the fuse clip andauxiliary fuse carrier in place. Fig. 9 is an end elevation and Fig. 10a side elevation of the fuse carrier. Fig. 11 is a perspective view ofone of the fuse clips.

Similar letters and numbers of reference indicate like parts. 1

A is the base block, preferably made integrally of porcelain or otherrefractory insulating material. By means of the longitudinal partitionB, two recesses are formed in said block which respectively receive thefuse cases C, D. Said fuse cases areinterposed in the manner hereinafterexplained and respectively in the positive and negative conductors of athree-wire system. On the under side of the partition is formed astraight channel E, through which the neutral conductor N passes.

The fuse cases C, D are alike. Each comprises a cylindrical body portionF and end pieces of porcelain G, H, to which the body portion F, whichmay be of metal covered -with paper, is secured. Within each case is theusual fuse strip and filling. The porcelain end pieces are all alike.Each is provided with a metal contact plate I which extends across thebottom and is bent upwardly to lie against the sides of the end piece,andvis then turned over at its extremities to enter grooves on the topof the end piece, as shown in Fig. 7 at 31. An integral part J of thesame plate extends upwardly across the outer face of the end piece, andto this plate the end of the fuse strip, which passes through an openingin said end piece, is secured. The construction of the aforesaid fusecase is fullyset forth in another application for Letters. Patent,Serial No. 587,365, filed by me Oct. 17, 1910, and is, therefore, notherein claimed.

At each end of each recess lllthe block are disposed contactclips K.which are all alike.

As shown in Fig. 11, each consists integrally of a metal plate, havingits sides L, M, bent upwardly to lie in contact with the surfaces of theblock. One side L is bent outwardly at its upper extremity to enter arecess O in the face of the partition B, Fig. 8. The other side M issplit downwardly for a short distance. A part Y .is left straight andvertical, and another part P is bent outwardly to enter a recess Q inthe inner face of the block wall. The outer edges of the sides L, M,bear against vertical shoulders R, formed in thepartition and wall. Thebottom portion of each clip K is extended as shown at T to formterminals to which the circuitwires are connected by the-usual screwbolts U. When the fuse cases D, E, are in place, contact plates I fit inthe clips K, St that circuit is established through the fuse strips. 1

l n conjunction with each main fuse in the cases D, E, 'I provide anauxiliary fuse arranged in the following manner: 12,F1gs. 9, 10, is anauxiliary fuse carrier, formed of porcelain, having a flat upper edge13, fiat end edges 11, 15, and a curved under edge 16. Between each endedge and the curved under edge is a cut away portion forming a shoulder,to which shoulders are secured the contact plates 17, 18. Each contactplate is bent upwardly to lie against the inner side of the carrier, andthen downwardly at 19 to form a leaf spring. The end and curved underedges of the carrier-are tongued. The auxiliary fuse V is seated in agroove formed in the tongue on the curved under edge, and is connectedat its ends to contact plates 17, 18. Each wall of the box is suitablycut away to receive a fuse carrier, and the inner edges of the cut awayportion are grooved to receive the carrier tongues. \Vhen the carrier isseated in place, the upper edge 13 thereof comes flush with the topsurface of the block A, and the spring contact plates 17, 18 thereonmeet the vertical parts 0 of the contact clips K. Hence fuses V in thetwo carriers come in shunt with the fuse strips in the cases D, E.

The auxiliary fuses V constitute means for determining the condition ofthe main fuses, without necessitating any examination of the main fusesthemselves, which means are removable from the base block, forinspection, independently of and hence without disturbing said mainfuses. If the auxiliary fuse is found to be blown, the fact of theblowing of the main fuse is thus indicated, and the main fuse isremoved. If not, the carrier is replaced.

In order to prevent the unauthorized removal of both the fuse cases D,E, and the carriers 12, and also to prevent access to the circuitconnections, I provide a metal cover \V and end shields X, Figs. 1 and5. The cover is downwardly flanged to fit over the block. The shields,one of which is shown in. place in Figs. 1 and 5, (also in dotted lines,Fig. 2) are of metal, and consist each of a bottom plate 20 andend-walls 21, 22 integral therewith, and a separable bent cover 23 whichis flanged at its ends and extends over the top and front edges 22. Onthe front edges of walls 21, 22 are lugs 24 which enter openings in thecover 23. Secured in said cover is a conducting pipe 26 for the circuitwires. The block B and cover W is received and fits in the open side ofthe shield X. In order to secure the shield X and cover W in place, Iprovide on the parof the walls 21,

tition a fixed double lug 27 which extends up through the cover. A lookbar 28 is bent over at one end to engage in an opening on the shieldcover 23, and at its opposite end enters between the parts of lug 27Through registering openings in said lug and bar a seal fastening,indicated at 30, is secured. The cover and locking bar thus form meansfor locking the auxiliary fuse carriers in place.

I claim:

1. An electric cut-out comprising a support, a main fuse therein, aremovable member seated in said block, an auxiliary fuse carried by saidmember, and cooperating contacts on said fuses.

2. An electric cut-out comprising a main fuse, a support therefor, meansfor connecting said fuse to said support, means for visually indicatingthe condition of said fuse, means for removably connecting saidindicating means to said support, and a locking device for saidindicating means: the said indicating means connection being separateand distant from said fuse connection.

3. An electric cut-out comprising a support, a fuse case and fusetherein, an auxiliary fuse, and a removable member carrying saidauxiliary fuse.

4. An electric cut-out comprising a base block, a fuse case and fusethereon, a removable carrier seated in said block, and an auxiliary fuseseated in a face of said carner;

5. An electric block, a fuse case able carrier seated in a recess in andan auxiliary fuse seated in face of said carrier.

6. An electric cut-out comprising a base block, a fuse case and fuse, anauxiliary fuse and carrier therefor, the said carrier being seated insaid block, contacts on said fuse case connected to the terminals ofsaid fuse, and cooperating contacts on said carrier connected to theterminals of said auxiliary fuse the said carrier being seated in saidblock and being removable therefrom independently of said fuse case.

7. An electric cut-out comprising a base block, a fuse case and fuse, anauxiliary fuse and carrier therefor, the said carrier being seated insaid block, means for locking said carrier in its seat, contacts on saidfuse case connected to the terminals of said fuse, and cooperatingcontacts on said carrier connected to the terminals of said auxiliaryfuse.

8. An electric cut-out comprising a base block, a fuse case and fusedisposed in a recess in said block, an auxiliary fuse and car riertherefor, the said carrier being seated in and forming a art of a wallof said block, contacts on said cut-out comprising a base andfusethereon, a removsaid block, the under fuse case connected to theterminals of said fuse, and cooperating contacts on said carrierconnected to the terminals of said auxiliary 'fuse.

9. An electric cut-out comprising a base block of refractory insulatingmaterial having a wall in two parts united by a tongue and groovejoin-t, one of said parts being re-'" movable, a main fuse in said baseblock, an auxiliary fuse supported on the edge of said movable portionof said wall, and cooperat-' 10 ing contacts "connected to the terminalsof said fuses. v In testimony whereof I have affixed my signature inpresence of two witnesses.

THOMAS E. MURRAY. Witnesses:

GERTRUDE T. PORTER, MAY T. MCGARRY.

